Thank you Marco. Obviously, I hadn't thought about a manual reordering.
In fact, both options would be interesting. After a restore with many open windows, for example, the previous sort is lost, so it would be good to be able to sort all the windows automatically (by type/subtype and name for example).
For Marco K. - Anyway, this may be an enhancement to make (or a bug?) to the restore feature (not) to keep windows ordering.
Regards,